StarkWare has introduced a Quantum Secure Bitcoin (QSB) proposal aimed at protecting Bitcoin from quantum computing threats without altering the network. The proposal suggests replacing Bitcoin's current Elliptic Curve Digital Signature Algorithm (ECDSA) with hash-based proofs, which are resistant to quantum attacks. This approach does not require a soft fork or miner confirmation, offering immediate results within Bitcoin's existing consensus rules. However, the QSB method faces challenges due to its high cost and complex user experience. Each transaction could cost between $75 and $200, significantly higher than the current average transaction fee of 33 cents. StarkWare researcher Avihu Levy acknowledges these limitations, noting that the method is experimental and not practical for widespread use. The proposal is intended as a "last resort" due to its commercial unfeasibility and the intensive off-chain GPU processing required for each transaction.